Pedicle screw and screw-rod system for the treatment of spinal tuberculosis with continuous irrigation and drainage

Abstract

The invention discloses a sustainable flushing and drainage pedicle screw for treating the spinal tuberculosis and a screw bar system composed of the pedicle screw. The pedicle screw comprises a screw body, a screw tail and a body-tail expansion part, wherein the screw body, the screw tail and the body-tail expansion part are integrated and hollow, and the body-tail expansion part is arranged between the screw body and the screw tail. The tail end of the screw tail is communicated with a flushing / drainage tube, a plurality of micropores and a plurality of main holes used for flushing / drainage are formed in the screw body, a prism is arranged on the outer side face of the body-tail expansion part and used for assembling or disassembling the screw, and the tail face is used for bearing a screw bar connecting piece. The screw bar system comprises the pedicle screw, the screw bar connecting structure and a connecting bar, wherein the screw bar connecting structure is positioned between the screw tail and the connecting bar and supported on the big tail face of the body-tail expansion part, and the connecting bar is fixedly connected to the screw tail through the screw bar connecting structure. The sustainable flushing and drainage pedicle screw and the screw bar system play a role in spine fixing, abscess drainage, flushing, nidus dosing and diseased area dosing, improve adaptability to a spinal tuberculosis operation and achieve a better treatment effect; multi-point flushing, drainage and dosing are achieved, it is avoided that mycobacterium tuberculosis adheres on the screw body and breeds, and the adaptability is high. The sustainable flushing and drainage pedicle screw and the screw bar system are simple in structure, easy to operate and small in wound.

Description

technical field [0001] The present invention relates to a medical device for treating spinal tuberculosis, in particular to a pedicle screw for treating spinal tuberculosis which can be continuously flushed and drained, and also relates to a screw-rod system composed of the above-mentioned pedicle screw, which can be used for tuberculosis The flushing, drainage and medication of the lesion, and the internal fixation of the spine at the same time, can achieve early operation and sufficient drainage for spinal tuberculosis, and cooperate with the focus of medication to expand the indications for spinal tuberculosis surgery, promote the recovery of tuberculosis, stabilize the diseased spine, and reduce complications. Occurs, promotes the recovery of spine and spinal cord functions, and finally achieves the purpose of improving curative effect. Background technique [0002] Spinal tuberculosis is caused by vertebral body lesions caused by tuberculosis infection. Spinal tubercul...

AI Technical Summary

Problems solved by technology

This method has the following defects: (1) The number and location of drainage tubes are limited, and one more drainage tube is placed to enter the abscess through the paravertebral soft tissue, which is only suitable for drainage of paravertebral and prevertebral abscesses, and has poor adaptability; (2) ) At present, the main purpose of the drainage tube is only to drain pus and shrink the abscess cavity, and there is no operation for continuous flushing of the pus cavity. Large effect blank and uncertain effect; (3) There may be a septum in the abscess cavity, which may cause incomplete drainage; (4) Since the drainage tube is only fixed on the soft tissue on the skin surface, the position of the drainage tube is variable and easy to (5) Paravertebral puncture is used to insert a drainage tube, which is traumatic and difficult to operate, causing a high risk of damage to blood vessels and organs, and may even cause abscesses to break into the thoracic cavity and retroperitoneum, causing tuberculosis to spread, resulting in serious adverse events Consequences; (6) Mycobacterium tuberculosis will grow and multiply attached to the drainage tube, which will affect the curative effect

[0004] Based on the above reasons, in clinical treatment, surgery often cannot be performed in time due to poor control of the lesion, which affects the final recovery of spinal cord function; moreover, the lesion after surgery lacks drainage and flushing for a long period of time, resulting in a long course of disease and easy recurrence. Patient inflicts great physical and mental suffering

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